What is the recommended procedure to make coins from coldstorage accessible. Assume latest wallet.dat v18 and prv1/pub1 key pair (like shown in dumpwallet). Now i have a hotwallet and would like to make ONLY this pair accessible. Do i dumpprvkey pub1 and later importprvkey prv1 in hotw? Does it affect the coldstorage security/privacy?

Second, is it safe to backup that keypair to make it quickly accessible (again not effecting coldw)?